Gas-engine



' 3 Sheets-Sheet 1.

A. SOHMID & J. O. BEOKPELD GAS ENGINE.

No. 371,793. Patented Oct. 18, 1887.

WITNESSES: INVENTOR,

PETERS. PhoXn-Lhhngnphar, Washington, a c.

(No Model.) 3 SheetsS1 1eet 2., A. SGHMID & J. O. BEOKPELD.

GAS ENGINE.

Patented Oct 18,1887.

Atty.

N PETERS. Phulo-Lflhngmphnr. wnhin mn. B. c.

3 Sheets-Sheet 3. A. SOHMID & J. G. BEOKFELD.

GAS ENGINE.

Patented 001;. 18, 1887.

(No Model.)

INVENTOR, I

Gas

N. PETERs Pnowuma m m. Washington. 0 c.

Nrrnn STATES PATENT rrrcn.

ALBERT SGHMID, OF ALLEGHENY, AND J. CHARLES BEOKFELD, OF RESERVE, ALLEGHENY COUNTY, PENNSYLVANIA.

GAS-ENGINE.

SPECIFICATION forming part of Letters Patent No. 371,793, dated Qctcber 18, 1887.

Application filed June 29, 1887. Serial No. 242,823. (No model.)

To all whom, it ntay concern.-

Be it known that we, ALBERT SoHMID, a citizen of the Republic of Switzerland, residing at Allegheny, and J. GHAnLEs BECKFELD, a citizen of the United States, residing at Reserve township, in the county of Allegheny and State of Pennsylvania, have invented or discovered certain new and useful Improvementsin Gas-Engines, of which improvements the following is a specification.

In Letters Patent No. 362,187, granted May 3, 1887, we have described and claimed a gasengine having as its distinctive features the co-operation of the pistons and the valve for regulating the flow of gas and airto the compression-cylinder and the exhaust of dead gases from the powencylinder. In an engine constructed as set forth in said Letters Patcut the explosive power of the gases is operative in one direction onlyi. 6., to force the pistons outward-they being moved in the opposite direction or inwardly by the inertia of the fly or balance wheel.

The invention herein relates to a construction of engine wherein the explosive force of the gas is utilized during the entire revolution of the engine, and wherein the same valves are operative in regulating the flow of gases to and from the several cylinders.

In the accompanying drawings, forming a part of this specification, Figure 1 is a sectional elevation of our improved engine, the section being taken on the line 3 y, Fig. 2. Fig. 2 is a similar view, the section being taken on the line was, Fig. 1. Fig. 3 is a sec tional elevation of the cylinders, the section being taken on the line a 2, Fig. 2. Fig. 4 is a transverse section on the line i t.

In the practice of our invention the powercylinders 1 and l, compressioncylinders 2 and 2, and valve-chambers 3 and 4 are preferably formed in a single casting, which is supported on the crank-case 5, said case serving as a support or bed for the engine. In the sides of the crank-case are formed the journals or bearings for the shaft 6, provided with crank-arms 7, arranged diametrically opposite to each other, as shown, and to the pins of said crank-arms are connected the lower ends of the pitmen or connecting-rods 8, whose upper end is connected in any suitends, the power-cylinders opening into the comp ression-eylinders, which are of a greater diameter than the powencylinders. The pistons 9 and 9 and 10 and 10 are formed inlegral with each other.

Within the valvechamber 3 is arranged the valve 11, preferably of the pistontype, provided with the ports or passages 12 and 13 for the flow of gases to and from the eylin ders when the valves are in proper relation to the several parts, as Will be hereinafter stated. Gas is admitted into the valve chamber 3 through the ports 14 and 15, and air through the port 16 intermediate of the gas-ports, as shown in Figs. 1 and 2. The gas-ports L1 and 15 are so located with reference to the stroke of the valve 11 that the port 14: will be n11- covered by the upward movementof the valve and closed by its downward movement, while the port 15 is opened by the downward and closed by the upward movement of the valve, the airport 16 being constantly open. The ex plosive mixture formed by the com mingling of the gas and air when either of the gas-ports is opened is conducted by the ports 17 or 18 into one or the other of the compression-cylinders, the port 17 leading into the cylinder 2 and the port 18 into the cylinder 2 at their upper ends. (See Fig. 1.) From the compressioncylinders the mixed gas and air are conducted by the ports 19 and 20 into the valve-chamber 4, in which is arranged the valve 21, provided with the port or passage 22, by which in certain positions of the valve the explosive mixture is conducted to the upper ends of one or the other of the power-cylinders through the ports 23 or 24, the formerleadingto the cylinder 1 and latter to the cylinder 1. The power cylinders are made sufficiently longer than thestroke of the pistons 9 and ,9 to provide a chamber or space for the explosion of the gas above the piston. A portion of the explosive mixture escapes by the ports 23 and 24 and port 25 to an igniter of any suitable construction located at the outer end of said port 25. The dead gases escape from the cylinder 1 by the port 26 into the valvechamber 3, and thence by the passage 13, formed in the valve 11, and the port 28 into the open air. The dead gases from the cylinder 1 escape by the port 29 into the valve-chamber 3, and thence by the means above described into the air.

The valves 11 and 21 are connected by rods 30 and 31 to eccentrics 32 and 33 on the powershaft 6, the eccentric 32 being adjustable around or across the shaft through the medium of the governor mechanism 34, all as fully described in the Letters Patent hereinbefore mentioned.

The several pistons and valves being in the position shown-13. 6., immediately after an explosion in the cylinder 1--and the valve 21 having moved down sufficiently far to cover the port 23, the operation of the engine is as follows: During the upward movement of the pistons 9 and 10 the pistons 9 and 10 are descending under the force of an explosion in the cylinder 1 at or near the beginning of the descending stroke of the pistons 9 and 10,the ports 15 and 18 are opened by-the valve 11, which is also moving down, thereby admitting a mixture of gas and air into the compressing-cylinder 2, the air-port 16 being constantly open, as before stated. An explosion having occurred in the cylinder 1, as above stated, the pistons 9 and 10 are forced downward and the pistons 9 and 10 upward. As the movements of the valve 11 are regulated to slightly precede the movements of the pistons in the cylinders-that is to say, the valve starts on its downward movement just prior to the corresponding movement of the piston 9 and precedes the piston 9 in its upward movement-it follows that just before pistons 9 and 10 move upward the valve 11 will close the ports 15 and 18. After the pistons 9 and 10 have accomplished about one-half of their 1 upwardmovement the valve 21 will in its movements uncover theports 2O and'24, thereby permitting the gas and air to pass from the compressing-cylinder 2 into the powercylinder 1 under the compressive force exerted by the piston 10. Simultaneously with the attai nment by the pistons 9 and 10 of the upward limit of their movement the valve 21 has in its movement closed the port 20 and con nccted the port 24 with the port 25, leading to the igniter, and thereby effecting an explosion in the cylinder 1. As the valve 21 continues its upward movement, the ports 24 and 25 are closed, and as said valve reaches the upward limit of its movement the ports 19 and 23 are opened, thereby permitting combined gas and air to flow into the cylinder 1 from the cylinder 2, into which it had been admitted by the valve 11, uncovering the ports 14 and 12 during its upward movement. As the valve 21 descends, it closes the port 19 and connects the port 23 with the igniter 25, such connection of the two ports being effected when the pistons 9 and 10 have reached the upward limit of their stroke.

The exhaust of the dead gases from the cylinders 1 and 1 is regulated by the valve 11, said valve in its upward movement, and near the limit thereof, connecting the port 29,1eading from the cylinder 1, with the outletports 28, and at a corresponding period on its downward movement connecting the port 26 from the cylinder 1 with the ports 28. It will be observed that the exhaust from the cylinder 1 occurs simultaneously, or approximately so, with the admission of gas and air into the compressing-cylinder 2*, and that from the cylinder 1 with the admission of gas and air into the cylinder 2. The exhaustports 26 and 29 are so located that they will coact with the valve 11 in regulating the exhaust of dead gases from the cylinders 1 and 1.

The ports 14 and 17 and 15 and 18 should be so located with reference to each other that the ports 14 and 15 will be uncovered simultaneously with or immediately after the uncovering of the ports 17 and 18, thereby avoiding any escape of gas through the airport 16, which is constantly open.

We claim herein as our invention- 1. In a gas-engine, the combination of two power and compressing cylinders, a valvechamber connected to each of said cylinders by suitable ports, and a valve located in said chamber and constructed to regulate the flow of gases to and from said cylinders alternatel y, substantially as set forth.

2. In a gas-engine, the combination of two power and compressing cylinders, valvechambers connected to each of said cylinders by suitable ports, and valves located in said chambers and constructed to regulate the flow of gas and air alternately to the compressingcylinders, and thence alternately to the powercylinders, substantially as set forth.

3. In a gas-engine, the combination of two pairs of power and compressing cylinders, a valve-chamber connected to said cylinders by suitable ports, and avalve located in said chamber and constructed to co-operate alternately with each powenpiston to regulate the flow of dead gases from the power-cylinders, substantially as set forth.

4. In a gas-engine, the combination of two pairs of power and compressing cylinders, a valve-chamber connected to each of said cylinders and provided withan exhaust-port, and a valve located in said chamber, said valve and ports being constructed to regulate the flow of gas and air to the compressing-cylinder of one pair and the exhaust of dead gas from the power-cylinder of the other pair while IIO moving in one direction, substantially as set 

